A highly infectious variant of COVID-19 has reached Australia and is spreading rapidly around the world.
The first Australian case of the South African variant is a woman who arrived in Queensland on December 22 and went straight into hotel quarantine.
"Genome sequencing has come back to show that she has this new variant that has been picked up in South Africa that is thought to be more contagious," the state's Chief Health Officer Jeannette Young said.
The woman was on Tuesday transferred by ambulance to the Sunshine Coast University Hospital.
The variant is causing concern worldwide because it spreads faster than novel coronavirus, although it's not necessary more deadly.
The World Health Organisation is yet to determine whether the new variant - and another that developed recently in the UK - could undermine vaccines being rolled out around the world.
The first Australians are set to be vaccinated by the end of March next year.
At least 24 countries worldwide have recorded cases of the South African or UK coronavirus variants, including Lebanon, Singapore, Pakistan, India, South Korea, Japan, France, Germany and Italy.
Queensland Health Minister Yvette D'Ath said while other jurisdictions had detected a UK variant of the virus, this was the first time the South African strain had been confirmed in Australia.
"We are absolutely confident that all proper measures were taken at the hotel and in the transfer, and of course at the hospital in relation to this positive case," she said.
Australia has identified five cases of the British variant in arrivals from the UK, including two in NSW, two in Victoria and one in South Australia.
The South African variant case's confirmation comes as the federal government said it was considering granting "alternate entry" to Australians returning from overseas if they can prove they have already been vaccinated for the virus.
"The Australian government is considering mechanisms for recognising an international immunisation certificate for COVID-19 and potential alternate entry and quarantine arrangements for returning Australians who may have been vaccinated if it is safe to do so," a Health Department spokesman told The Sydney Morning Herald in a report published on Wednesday.
And Immigration Minister Alex Hawke has repeated his threat to deport backpackers or expatriates caught having large parties in breach of public health orders.
"I have asked the Department of Home Affairs to try to identify anybody who has been disobeying public health orders," he told Seven's Sunrise program on Wednesday.
"If a person is a temporary visa holder, we will cancel those visas or take action against those people.
"There is no excuse at this point. Australians are tired of it, and we want to make sure that everyone is doing the right thing."
Meanwhile, there are fears in NSW that a COVID-19 outbreak in Sydney's northern beaches area could have broken away into the broader community.
The government is urgently trying to identify the sources of three people's infections outside the virus epicentre of Avalon.
One lives in Wollongong on the state's south coast but recently visited Sydney. The others live in Sydney's inner west and north.
So far no immediate link to the northern beaches cluster, which now totals 129, has been found.
As New Year's Eve approaches, governments across Australia, including NSW, are warning residents to observe coronavirus restrictions and social distancing.
Sydneysiders have been mostly banned from watching the famous New Year's Eve fireworks from the harbour with the foreshore fenced off.
The NSW government wants people to stay at home and watch the shortened seven-minute midnight firework show on TV.
Meanwhile, Victorians are being urged not to venture into Melbourne's CBD to celebrate New Year's Eve after the state on Tuesday racked up its 60th day without any case of community transmission of coronavirus.
So far, 909 people have died in Australia from coronavirus.